ESFERA 2

0.05 UTI

0.0

C_N

0.14

C_dens

0.12

C_C3

0.0

C_lit

1.0

C_dup

N_m (P>50%) 22

Core radius and density 2.4 [pc], 0.7 [pc^-2]

C3 classification DC

C_N 0.0 Sparse
C_dens 0.14 Very loose
C_C3 0.12 Very low quality
C_lit 0.0 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

MOCA 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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ESFERA 2 is a sparse, very loose object of very low C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by high extinction. It is catalogued as a young cluster (see Parameters). It was recently reported in the literature.

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Relatively close High extinction Young

Data

🔍 Search references for ESFERA 2 in: SciX Simbad

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Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	230.247	-57.727	0.422	-3.655	-3.464	-37.597
Corti et al.	2026	230.22	-57.737	–	-3.59	-3.5	–

💡 Note: The UCC values are estimated from its identified members.

Reference	Year	Dist [kpc]	Av [mag]	DAv [mag]	Age [Myr]	[Fe/H] [dex]	Mass [Msun]	B_frac	BSS
UCC	99999–	1.91	3.5	–	50	–	–	–	–
Corti et al.	2026	1.91	3.50	–	50	–	–	–	–

Visualization

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